<abstract xmlns="http://www.w3.org/1999/xhtml">
				
				 Phonon properties have been studied using reduced sound velocity of Eu0.5Ba0.5TiO3 (EBTO). To achieve this aim, the anharmonic phonon-phonon interaction and the spin-phonon interaction were used. It was shown that the reduced sound velocity of multiferroic EBTO exhibits a kink at TN = 1.9 K. This anomalously reduced sound velocity can be interpreted as an effect of vanishing magnetic ordering above TN. What’s more, the ferroelectric subsystem cannot be influenced by the magnetic subsystem above TN for TN ≪TC in the EBTO. It was found that the reduced sound velocity decreases as T increases near ferroelectric transition TC. That is to say, the sound velocity softens near ferroelectric transition TC. It is also noteworthy that the reduced sound velocity softens when the RE (the coupling between the ferroelectric pseudo-spins and phonons), V(3) and |V(4)| (the third- and fourth-order atomic force constants of the anharmonic phonons, respectively) increase. These conclusions are all in good accordance with the experimental data and theoretical results. 
			</abstract>

Phonon properties have been studied using reduced sound velocity of Eu0.5Ba0.5TiO3 (EBTO). To achieve this aim, the anharmonic phonon-phonon interaction and the spin-phonon interaction were used. It was shown that the reduced sound velocity of multiferroic EBTO exhibits a kink at TN = 1.9 K. This anomalously reduced sound velocity can be interpreted as an effect of vanishing magnetic ordering above TN. What’s more, the ferroelectric subsystem cannot be influenced by the magnetic subsystem above TN for TN ≪TC in the EBTO. It was found that the reduced sound velocity decreases as T increases near ferroelectric transition TC. That is to say, the sound velocity softens near ferroelectric transition TC. It is also noteworthy that the reduced sound velocity softens when the RE (the coupling between the ferroelectric pseudo-spins and phonons), V(3) and |V(4)| (the third- and fourth-order atomic force constants of the anharmonic phonons, respectively) increase. These conclusions are all in good accordance with the experimental data and theoretical results.

Anharmonic phonon properties in Eu0.5Ba0.5TiO3

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":{"sub":[0.5,0.5,3],"content":["Anharmonic phonon properties in Eu","Ba","TiO"]}}

Phonon properties have been studied using reduced sound velocity of Eu0.5Ba0.5TiO3 (EBTO). To achieve this aim, the anharmonic phonon-phonon interaction and...

Anharmonic phonon properties in Eu_0.5Ba_0.5TiO₃

Pubblicato online: 18 mag 2018

Pagine: 141 - 144

Ricevuto: 10 ago 2017

Accettato: 14 gen 2018

DOI: https://doi.org/10.1515/msp-2018-0003

Parole chiave
anharmonic phonon-phonon interaction, reduced sound velocity, multiferroics

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Anharmonic phonon properties in Eu0.5Ba0.5TiO3

Pubblicato online: 18 mag 2018

Pagine: 141 - 144

Ricevuto: 10 ago 2017

Accettato: 14 gen 2018

DOI: https://doi.org/10.1515/msp-2018-0003

Parole chiaveanharmonic phonon-phonon interaction, reduced sound velocity, multiferroics

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Anharmonic phonon properties in Eu_0.5Ba_0.5TiO₃

Parole chiave
anharmonic phonon-phonon interaction, reduced sound velocity, multiferroics